資料載入中.....
|
請使用永久網址來引用或連結此文件:
https://ir.cnu.edu.tw/handle/310902800/32205
|
| 標題: | Enhanced reliability of LEDs encapsulated with surface-modified zirconia/silicone hybrids under thermal shock |
| 作者: | Lin, Yen-Ting
Li, Yen-Hsien
Lei, I-Ann
Kuo, Chih-Yu
Lee, Chia-Fen
Chiu, Wen Yen
Don, Trong-Ming |
| 貢獻者: | Natl Taiwan Univ, Dept Chem Engn
Natl Taiwan Univ, Dept Mat Sci & Engn
Natl Taiwan Univ, Inst Polymer Sci & Engn
Chia Nan Univ Pharm & Sci, Dept Cosmet Sci
Chia Nan Univ Pharm & Sci, Inst Cosmet Sci
Tamkang Univ, Dept Chem & Mat Engn |
| 關鍵字: | LED
Silicone
Zirconia
Encapsulation
Thermal shock |
| 日期: | 2018-02-15 |
| 上傳時間: | 2019-11-15 15:45:07 (UTC+8) |
| 出版者: | ELSEVIER SCIENCE SA |
| 摘要: | This study focused on the importance of the interfacial adhesion in the zirconia (ZrO2)/silicone hybrids as the encapsulating material on the reliability of the LEDs. Surface-modified ZrO2 nanoparticles (m-ZrO2) with functional groups were prepared by a sol-gel reaction which could become reactive to the silicone resin. The produced m-ZrO2/silicone hybrid at 5 wt% had a refractive index of 1.569 at 633 nm and light transmittance of 98.9%. Moreover, the coefficient of thermal expansion was greatly reduced by the introduction of m-ZrO2 into the silicone resin. When using this m-ZrO2/silicone hybrid, the luminous flux of the LED was 10.1% higher than that using a neat silicone resin. Most importantly, the LEDs encapsulated with the m-ZrO2/silicone had the best performance under thermal shock among all the LEDs tested in this study, owing to its strong interfacial adhesion between the nanoparticles and matrix. Moreover, the thermal stresses developed in hybrids were calculated and found to agree with the performance evaluation of the encapsulated LEDs under thermal shock, in which the m-ZrO2/silicone hybrid had the lowest thermal stress. This study proposed that the m-ZrO2/silicone hybrid material with strong interfacial adhesion could be useful for the encapsulation of LEDs even under extreme thermal conditions. (C) 2017 Elsevier B.V. All rights reserved. |
| link: | http://dx.doi.org/10.1016/j.matchemphys.2017.12.011 |
| 關聯: | Kaohsiung Journal of Medical Sciences, v.206, pp.136-143 |
| 顯示於類別: | [化妝品應用與管理系(所)] 期刊論文
|
文件中的檔案:
| 檔案 |
描述 |
大小 | 格式 | 瀏覽次數 |
|---|
| index.html | | 0Kb | HTML | 1293 | 檢視/開啟 |
|
在CNU IR中所有的資料項目都受到原著作權保護.
|
